Higher LPS-stimulated TNF-alpha mRNA levels in peripheral blood mononuclear cells from Chinese ankylosing spondylitis patients with -308G/A polymorphism in promoter region of tumor necrosis factor: association with distinct A33/B58/Cw10 haplotypes.

Rheumatology International
Ming-Chi LuNing-Sheng Lai

Abstract

To investigate the effects of TNF-alpha -308, -238 promoter polymorphisms on TNF-alpha transcription in B27 positive Chinese patients with ankylosing spondylitis (AS). The possible relationship between polymorphisms, MHC antigens, and quantitative TNF-alpha mRNA expression were evaluated. Single nucleotide polymorphisms (SNPS) of TNF-alpha -308 and -238 were performed by PCR-amplification refractory mutation system method (PCR-ARMS) in sixty-seven B27-positive AS patients and 60 HLA-B27 positive healthy controls in Chinese. Quantitative measurement of TNF-alpha mRNA in peripheral blood mononuclear cells was performed with real time RT-PCR. The polymorphisms were correlated to quantitative TNF-alpha mRNA, and MHC antigens (determined by SSP method) in AS patients. The prevalence rate of both -308G/A and -238G/A TNF-alpha promoter polymorphisms in patients were not significantly different from those in normal subjects. However, a significant high LPS-stimulated TNF-alpha mRNA expression was found in peripheral blood mononuclear cells from patients with promoter -308G/A polymorphism (TNF2) as compared to those in -308G/G genotype (TNF1). Furthermore, -308G/A polymorphism in patients was found to be tightly associated with distinct...Continue Reading

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